When, after an event, measures are taken which, if taken previously,
would have made the event less likely to occur, evidence of the subsequent
measures is not admissible to prove negligence or culpable conduct in connection
with the event. This rule does not require the exclusion of evidence of
subsequent measures when offered for another purpose, such as proving
ownership, control, or feasibility of precautionary measures, if those issues
are controverted, or impeachment. (1983, c. 701, s. 1.)